package chapter04.demo1;
class Animal{
    void shout (){
        System.out.println("动物发出叫声");
    }
}
class  Dog extends Animal{
    void shout(){
        System.out.println("汪汪汪....");
    }
}
public class Example03 {
    public static void main(String[] args) {
        Dog dog = new Dog();
        dog.shout();
    }
}
